diff --git a/src/sql/azdata.proposed.d.ts b/src/sql/azdata.proposed.d.ts
index f97207efdf..8886195858 100644
--- a/src/sql/azdata.proposed.d.ts
+++ b/src/sql/azdata.proposed.d.ts
@@ -83,10 +83,12 @@ declare module 'azdata' {
 		}
 
 		export interface ICellContents {
-			attachments?: ICellAttachment;
+			attachments?: ICellAttachments;
 		}
 
-		export type ICellAttachment = { [key: string]: { [key: string]: string } };
+		export type ICellAttachments = { [key: string]: ICellAttachment };
+		export type ICellAttachment = { [key: string]: string };
+
 	}
 
 	export type SqlDbType = 'BigInt' | 'Binary' | 'Bit' | 'Char' | 'DateTime' | 'Decimal'
diff --git a/src/sql/workbench/contrib/notebook/browser/cellViews/interfaces.ts b/src/sql/workbench/contrib/notebook/browser/cellViews/interfaces.ts
index 19bdbd0609..5b86478460 100644
--- a/src/sql/workbench/contrib/notebook/browser/cellViews/interfaces.ts
+++ b/src/sql/workbench/contrib/notebook/browser/cellViews/interfaces.ts
@@ -34,9 +34,9 @@ export abstract class CellView extends AngularDisposable implements OnDestroy, I
 }
 
 export interface IMarkdownStringWithCellAttachments extends IMarkdownString {
-	readonly cellAttachments?: nb.ICellAttachment
+	readonly cellAttachments?: nb.ICellAttachments
 }
 
 export interface MarkdownRenderOptionsWithCellAttachments extends MarkdownRenderOptions {
-	readonly cellAttachments?: nb.ICellAttachment
+	readonly cellAttachments?: nb.ICellAttachments
 }
diff --git a/src/sql/workbench/contrib/notebook/browser/outputs/notebookMarkdown.ts b/src/sql/workbench/contrib/notebook/browser/outputs/notebookMarkdown.ts
index e57fef071a..a3fba2dda6 100644
--- a/src/sql/workbench/contrib/notebook/browser/outputs/notebookMarkdown.ts
+++ b/src/sql/workbench/contrib/notebook/browser/outputs/notebookMarkdown.ts
@@ -264,7 +264,7 @@ export class NotebookMarkdownRenderer {
 * In a cell, the above attachment would be referenced in markdown like this:
 * ![altText](attachment:test.png)
 */
-function findAttachmentIfExists(href: string, cellAttachments: nb.ICellAttachment): string {
+function findAttachmentIfExists(href: string, cellAttachments: nb.ICellAttachments): string {
 	if (href.startsWith('attachment:') && cellAttachments) {
 		const imageName = href.replace('attachment:', '');
 		const imageDefinition = cellAttachments[imageName];
diff --git a/src/sql/workbench/services/notebook/browser/models/cell.ts b/src/sql/workbench/services/notebook/browser/models/cell.ts
index 3756e3cee0..3596140af1 100644
--- a/src/sql/workbench/services/notebook/browser/models/cell.ts
+++ b/src/sql/workbench/services/notebook/browser/models/cell.ts
@@ -80,7 +80,7 @@ export class CellModel extends Disposable implements ICellModel {
 	private _isParameter: boolean;
 	private _onParameterStateChanged = new Emitter<boolean>();
 	private _isInjectedParameter: boolean;
-	private _attachments: nb.ICellAttachment;
+	private _attachments: nb.ICellAttachments;
 
 	constructor(cellData: nb.ICellContents,
 		private _options: ICellModelOptions,
diff --git a/src/sql/workbench/services/notebook/browser/models/modelInterfaces.ts b/src/sql/workbench/services/notebook/browser/models/modelInterfaces.ts
index 2f27ddfef0..bd250a8036 100644
--- a/src/sql/workbench/services/notebook/browser/models/modelInterfaces.ts
+++ b/src/sql/workbench/services/notebook/browser/models/modelInterfaces.ts
@@ -530,7 +530,7 @@ export interface ICellModel {
 	sendChangeToNotebook(change: NotebookChangeType): void;
 	cellSourceChanged: boolean;
 	readonly savedConnectionName: string | undefined;
-	readonly attachments: nb.ICellAttachment;
+	readonly attachments: nb.ICellAttachments;
 	readonly currentMode: CellEditModes;
 }